import java.awt.*;
import java.net.*;
import java.io.*;
import java.util.regex.*;

public class MDownload extends java.applet.Applet {
    public String msg = "Saving...";
    public void init() {
        this.msg = download(getParameter("db"), getParameter("num"), filename("Save as", getParameter("filename")));
    }

    public void paint(Graphics g) {
        g.drawString(this.msg, 25, 25);
    }

    /**
     * Pops up a File Save dialog, and returns the file name
     */
    public static String filename(String prompt, String selection) {
        Frame frame = new Frame();
        FileDialog fd = new FileDialog(frame, prompt, FileDialog.SAVE);
        fd.setFile(selection);
        fd.show();
        String file = fd.getFile();
        if (file != null && !file.equals("")) { file = fd.getDirectory() + fd.getFile(); }
        else { file = null; }
        return file;
    }

    /**
     *  Given 2 strings: url and User Agent, connects to the URL and returns the content as a string
     */
    public static String url2text(String urlstr, String userAgent) {
        StringBuffer text = new StringBuffer();
        try {
            URL url = new URL(urlstr);
            URLConnection con = url.openConnection();
            con.setRequestProperty("User-Agent", userAgent);
            con.connect();
            BufferedReader r = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String line;
            while ((line = r.readLine())!= null) { text.append(line); text.append("\n"); }
            r.close();
        } catch (Exception e) {}
        return text.toString();
    }

    /**
     *  Given 3 strings: url, User Agent and filename, connects to the URL and dumps the content into the file.
     */
    public static void url2file(String urlstr, String userAgent, String file) {
        InputStream in = null;
        OutputStream out = null;
        try {
            URL url = new URL(urlstr);
            URLConnection con = url.openConnection();
            con.setRequestProperty("User-Agent", userAgent);
            con.connect();
            in = con.getInputStream();
            out = new BufferedOutputStream(new FileOutputStream(file));
            byte[] buffer = new byte[1024];
            int numRead;
            while((numRead=in.read(buffer))!=-1){ out.write(buffer, 0, numRead); }
        } catch (Exception e) {
        } finally {
            try {
                if (in != null) { in.close(); }
                if (out != null) { out.close(); }
            } catch(IOException e) {}
        }
    }

    /**
     */
    public static String download(String db, String num, String file) {
        String real = "RMA/1.0 (compatible; RealMedia)";
        String firefox = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11";
        String smil = "";
        String msg = file;
        if (db.equals("M")) {
            smil = url2text("http://www.musicindiaonline.com/g/r/" + num + "/play2.smil", firefox);
            Pattern pattern = Pattern.compile("content=\"([^\"]*)\".*audio src=\"([^\"]*)\"", Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
            Matcher matcher = pattern.matcher(smil);
            if (matcher.find()) { url2file(matcher.group(1) + matcher.group(2), real, file); }
            else { msg = "Couldn't match " + db + " in " + smil; }
        }
        else if (db.equals("S")) {
            smil = url2text("http://ww.smashits.com/player/ra/ondemand/playlist.asp?6;giftsToIndia1.rm;1," + num, real);
            Pattern pattern = Pattern.compile("\"([^\"]*/song.asp[^\"]*)\"");
            Matcher matcher = pattern.matcher(smil);
            if (matcher.find()) { url2file(matcher.group(1), real, file); }
            else { msg = "Couldn't match " + db + " in " + smil; }
        }
        else if (db.equals("O")) {
            smil = url2text("http://www.oosai.com/oosai_plyr/playlist.cfm?sng_id=" + num, real);
            Pattern pattern = Pattern.compile("(\\S+)\\s*$");
            Matcher matcher = pattern.matcher(smil);
            if (matcher.find()) { url2file(matcher.group(1), real, file); }
            else { msg = "Couldn't match " + db + " in " + smil; }
        } else {
            file ="db is not M/S/O";
        }

        return msg;
    }

    public static void main(String args[]) {
        String msg = "";
        msg = download("O", "2254", "D:/temp/killme.rm");
        // msg = download("M", "dJfgI5.zhd.As1NMvHdW", filename("Save as", "Album.Thatthalikkudhe.rm"));
        // msg = download("S", "42693", filename("Save as"));
        System.out.println(msg);
    }

}